Earnings season is more than halfway over, but there are still some heavy hitters due to report this week, including several companies with a high percentage of investors betting against their results.

At least five companies whose stocks have heavy short interest, or bearish bets, built against them are on tap to report this week. The companies include solar-panel maker First Solar Inc., real-estate information provider Zillow Inc., electric-car company Tesla Inc., U.S. solar-panel installer SolarCity Corp. and coffee company Green Mountain Roasters Inc.

“Earnings reports slow down a little but we get some controversial high short interest names reporting that always make for good fanfare,” says Ian Winer, director of trading at Wedbush Securities. ”In my experience, the shorts in these names for the most part are eventually proven right, it is just that they are too early in their conclusions and it becomes a war of attrition as far as who can stay in the position long enough to make money.”

Here’s a rundown of those five stocks Winer mentioned in a note to clients.

First Solar

The company and its solar-panel rivals saw their earnings pressured last year by an oversupply of solar panels and manufacturing capacity. But First Solar, in particular, has benefited lately from stronger-than-expected demand for its solar plants. The company has also been expanding aggressively into emerging solar markets like Chile, Australia, South Africa and other countries with high liquid fuel prices.

Still, analysts and short sellers warn that many of the structural issues that hindered the industry haven’t disappeared entirely, and a long-term resurgence isn’t a certainty. First Solar is up more than 50% this year. Short interest accounts for about 15% of the stock’s outstanding float.

First Solar is scheduled to report on Tuesday.

Zillow

Seattle-based Zillow, which went public in July 2011, became popular by estimating home values on its website. The stock has more than quadrupled from its $20 IPO, with the bulk of the gains coming this year. Some 30% of the company’s float is sold short, suggesting many investors estimate the rally has gone too far to fast and is poised to fall sooner than later.

After Zillow’s previous quarterly report, Goldman Sachs downgraded the stock amid concerns that Zillow would experience slowing revenue growth, a prospect that wasn’t being reflected in the company’s high valuation.

Zillow is scheduled to report on Tuesday.

Tesla Motors

Tesla’s surprise quarterly profit earlier this year shocked Wall Street and put this stock on the map of many analysts and investors who previously hadn’t taken it seriously. Amid continued calls that the maker of luxury electric cars is due for a short squeeze, the stock continues to rally. Shares are up more than 300% this year and on Monday hit a fresh high above $140 as investors bet on CEO Elon Musk and his ability to lead Tesla to continued success.

Some 24% of the stock’s float is sold short. If Tesla’s earnings report, scheduled to be released on Wednesday, doesn’t live up to the hype, there could be plenty of room for the stock to fall.

SolarCity

SolarCity, which launched as a public company in December, installs rooftop solar panels for homeowners and businesses. It allows customers to buy the systems outright or–more typically–to sign a lease of up to 20 years to buy electricity in monthly payments.

Alongside Tesla, SolarCity is the other part of the so-called “Elon Musk trade.” Musk is the Chairman of SolarCity and his presence is one of the main reasons the stock is up about 275% this year. About 17% of the company’s float is sold short, as those bearish investors hope to benefit if earnings disappoint.

SolarCity is scheduled to report on Wednesday.

Green Mountain Coffee Roasters

Green Mountain has been the dominant player in the single-serve coffee industry, but the company has a history of struggling to accurately predict its sales. It also is dealing with growing competition and a pullback in the industry’s growth. As a result, it has been reviewing its business to improve manufacturing and marketing and to possibly expand into new products as it faces increasing competition from Starbucks Corp.'s single-serve coffee brewer.

Critics, namely famed hedge-fund titan David Einhorn, have spoken out against Green Mountain, challenging its accounting practices and ability to survive the changing environment. Green Mountain has dismissed Einhorn’s analysis.

Shares are typically volatile and about 25% of the stock’s float is sold short. The stock is up 84% this year, although it’s still down 42% from its record high above $100 in September 2011.